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Akira Fukuchi
The Graduate School of Natural Science and Technology, Okayama University
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Benjavun Ratanasthien
The Department of Geological Science, Faculty of Science, Chiang Mai University
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Rattanaporn Hanta
The Department of Geological Science, Faculty of Science, Chiang Mai University
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Nikorn Wongchai
Chiang Muan Mining Co. Ltd.